WO2013143656A2

WO2013143656A2 - Stand base for an operation microscope

Info

Publication number: WO2013143656A2
Application number: PCT/EP2013/000765
Authority: WO
Inventors: Hanna BEUTELSPACHER; Frank Koenig
Original assignee: Carl Zeiss Meditec Ag
Priority date: 2012-03-30
Filing date: 2013-03-14
Publication date: 2013-10-03
Also published as: US20170215982A1; WO2013143656A3; DE102012006409B4; US20150014511A1; US9622830B2; US9757205B2; DE102012006409A1

Abstract

According to the invention, the stand base (1) for an operation microscope for positioning on a floor (3) formed as a planar surface comprises a stand base main body (2), which is designed in such a way that it can be fitted with at least one first weight module (101), and has a stand base main body bottom side (6). The stand base (1) further comprises a supporting device (5) connected to the stand base main body (2), said supporting device being brought into contact with the floor (3) at at least three points for positioning the stand base (1), wherein the stand base main body bottom side (6) faces the plane defined by the at least three points. The stand base main body bottom side (6) also has a receiving device (11) for connection to an additional body (20) in a detachable manner. The shortest distance between the stand base main body bottom side (6) and the plane is greater than 10 cm.

Description

Tripod foot for a surgical microscope

The invention relates to a stand base for a surgical microscope according to the preamble of claim 1.

Surgical microscope systems often include a surgical microscope, a holding system to which the surgical microscope is attached, and a stand base that supports the base of this

Holding system forms. Since surgical microscopes are available in different equipment levels, the weight of the surgical microscope changes depending on the equipment level. A weight change of the surgical microscope has an effect on the holding system and the stand base of the holding system. To avoid tilting the tripod foot in any case, this should therefore be as difficult as necessary. An increase in the weight of the

On the other hand, surgical microscopes, on the other hand, can therefore be associated with a necessary increase in weight for the stand base.

From EP 1 026 531 Bl a microscope stand with a multi-part foot with weights is known, which can be turned over without the stand base body, can be mounted in or on an initially open cavity of the stand base body. The applicant Carl Zeiss Meditec AG offers under the name "S5" a tripod foot, from which the invention proceeds.This stand base comprises a hollow stand base body, which can be equipped with weights from the bottom.These weights are supported by holding elements in the stand base. Although on the one hand a high stability is necessary, which is achieved by a large weight of the tripod foot, but on the other hand there is also the desire to

Set up operating microscope system location variable. For this reason, it is also known to equip the stand base with rollers to change the position of the entire

Operating microscope system by moving the stand base on the rollers to allow. However, an unnecessary increase in the weight of the tripod foot makes it difficult, the

Surgical microscope system to move to another location. Therefore, it is common in practice to equip the stand base with the minimum necessary weight, on the one hand a

CONFIRMATION COPY to ensure a secure footing of the surgical microscope system and, on the other hand, to ensure maximum ease of movement when the system is moved on the rollers of the stand base. In order to meet the wide range of different equipment variants of a surgical microscope and the associated weight differences, there is therefore the desire to be able to equip the associated stand base in several different weight levels. Since the weight differences of the different stages of a surgical microscope can be significant, the conventional assembly method of weights in a

Tripod foot body is no longer sufficient to cover the necessary, large weight range reliably and inexpensively.

In addition to the requirement for a variable weight stand, there is a requirement for avoiding the risk of foot injury. The standard DIN EN 60601-1 3ed demands protection of the user against injuries of the feet. For this, it is required that the distance between the bottom of the stand base and the floor is either greater than 12 cm or less than 3.5 cm. This safety requirement is called underrun protection.

It is therefore the object of the invention to provide a stand base for a surgical microscope

be provided in which the total weight can be easily and inexpensively adapted over a wide range and at the same time the safety requirements of the

Underride protection can be reliably maintained.

This object is achieved for a generic stand for a surgical microscope with the features of the characterizing part of patent claim 1. Advantageous embodiments and modifications of the invention are the subject of the dependent claims.

The stand according to the invention for a surgical microscope for placement on a floor designed as a flat surface has a stand base body, which is formed equipped with at least one first weight module. The stand base body has a stand base body bottom and one connected to the stand base body

Supporting device, which is used to set up the tripod foot with at least three points with the Ground is brought to rest or can be an investment, with the stand base body bottom side facing the set by the at least three points level. The stand base base underside further includes a receiving means for releasable connection to an additional body. The smallest distance between the base of the stand base and the plane is greater than 10 cm.

In the smallest equipment variant is the tripod foot without additional weight and without

Additional body can be used. The smallest distance between the base of the stand base and the bottom of the base of the stand base is greater than 10 cm. This is not possible due to the large distance, with high ease of use, the pinching a Fuß-Rists. At the next higher level of a mounted surgical microscope, the weight of the stand base can be adjusted by means of equipping one or more weights. Due to the complete integration of the weight modules in the stand base body, the distance of the stand base body is obtained reliably to the ground in this case, too. Due to the Aufhahmeeinrichtung on the tripod foot base body bottom, an additional body can be quickly and easily attached to the stand base to achieve a further increase in weight.

The stand base according to the invention for a surgical microscope is, for example, arranged for the receiving device for the additional body to be designed as a plane surface. The formation of the receiving device as a flat surface can be easily and inexpensively manufactured. Thus, the receiving device has the smallest possible surface. This facilitates necessary hygiene measures. A necessary complementary surface of an additional body, which is attached to the receiving device, can be produced just as easily.

The receiving means of the stand base according to the invention for a surgical microscope may have one or more threaded holes. These can serve to releasably secure the additional body to the receiving device. In particular, two, three or four threaded holes can be provided. The introduction of two, three or four threads in the receiving device can be done inexpensively. The additional body can by means of attachment be attached by the example of two screws quickly and inexpensively to the stand base body.

The stand base body may have a cavity open to the bottom of the stand base body for releasably inserting the at least one first weight module. The introduction of a weight module into a cavity, which is open at the bottom of the stand base, has the advantage that the weight module is not visible from the side and from above. This allows the stand base to be invisibly upgraded for the user by weight. The cavity in the stand base body can for example be cylindrical, in particular cuboid or circular cylindrical. Advantageously, a rectangular, oval or round cross-section of the cavity viewed from the stand base base underside. Such a comparatively simple geometric shape of the cavity can be produced inexpensively. The height of the cavity is inexpensive to produce at a constant height. A corresponding shape-complementary weight module can also be produced easily. This is preferably introduced in a form-fitting manner from the stand base body underside into the cavity.

According to the invention, the stand base according to the invention can be releasably connected to the additional body at its stand base-body underside by means of the receiving means. This equipment version of the tripod foot has the advantages of being able to simply upgrade or dismantle the stand base in terms of weight. A stand base body model can thus be adapted for different equipment levels of surgical microscopes and the associated different weight of the surgical microscopes in the various equipment levels.

In the stand according to the invention for a surgical microscope, on which at the

Receiving device is attached to an additional body, the maximum distance of the additional body underside of the additional body, which faces the above specified by the at least three points level, to this level, for. smaller than 4 cm, preferably smaller than 3.5 cm. If the maximum distance between the underside of the additional body and the floor is less than 4 cm, the user's foot can only abut against the additional body up to the toes or toe area of a shoe. A pinching of the

Bale area is thus reliably excluded. To be safe and reliable To comply with requirements for underrun protection, the distance is advantageously less than 3.5 cm form.

In the additional body may be introduced a cavity for releasably introducing a weight module. If the additional body also has a cavity into which one or more weight modules can be inserted and fastened, an even greater latitude results in the adaptation of the weight of the operating foot balancing the weight of the surgical microscope. The tripod foot according to the invention for a surgical microscope, on which at the

Receiving device is a Zusatzköper attached, may be formed so that the cavity of the stand base body and the cavity of the additional body, viewed from the bottom, have the same cross-section. This is a very important advantage in the combination of the stand base body and an attached additional body. This makes it possible to bring one, two, three or more weight modules in the stand base from below, without having to remove the additional body before. The range of weight adjustment is very large. The tripod foot according to the invention for a surgical microscope, on which at the

Receiving device, an additional body is attached, is preferably adapted for that the additional body is positively adapted and / or in the geometric shape or physical shape (design) to the stand base body. In a form-fitting design, the smallest possible joints between the additional body and stand base body arise. This significantly facilitates the cleaning of the stand base, and this has advantages for the necessary hygiene measures when using the surgical microscope system in an operating room. In a design adapted to the design and an adapted, in particular identical surface structure of the additional body to the stand base body advantageously results in an attractive visual appearance of the entire tripod foot. Stativfuß- basic body and additional body are perceived as a single overall body and are also in terms of hygienic requirements such. The stand base according to the invention for a surgical microscope can also be designed such that the smallest distance between the stand base base underside and the plane is greater than 12 cm. If this distance between the bottom of the stand base body or the bottom of the lower built-in weight module and the floor has a value greater than 12 cm, the protection of a foot of the user can be reliably achieved. The foot can be moved to the instep under the tripod foot without the risk of pinching the forefoot or toes.

The stand base according to the invention for a surgical microscope can also be designed such that the greatest distance between the stand base body bottom and the plane is smaller than 20 cm. If the maximum distance between the base of the stand base is less than 20 cm, sufficient stability results for the stand base with reliable protection of the foot of the user. If the distance is greater than 10 cm and less than 20 cm, the level below the stand base, for example, the floor of an operating room, can be easily achieved with a cleaning system and kept clean.

A weight module for a stand according to the invention for a surgical microscope has an upper side and a lower side. Between top and bottom is a first

Provided through hole, wherein in the bottom parallel to the first through hole, a first threaded hole is introduced. On the connecting line between the first

Bore central axis of the through hole and the first threaded central axis of the

Tapped hole is a central axis parallel to the bore center axis, so that the distance between the first bore center axis and the central axis has the same value as the distance between the central axis and the first threaded central axis. In this case, the first thread is formed such that the outer diameter of the first

Tapping is smaller than the diameter of the first through hole.

This construction has the advantage that when using two identical trained

Weight modules, wherein the second weight module to the first weight module to 180 ° is arranged rotated about the central axis, the through hole of a weight module is congruent with the thread of the other weight module opposite. This makes a screw connection between the two weight modules very easy to produce.

The weight module described above for a surgical microscope stand according to the invention may have a second through-hole, which is parallel to the first through-hole, and a second threaded hole, which is parallel to the second through-hole. The second threaded bore is formed such that the outer diameter of the second threaded bore is smaller than the diameter of the second through-hole. The distance of the second bore center axis of the second through-hole to the central axis has the same value as the distance of the second

Thread central axis of the second threaded bore to the central axis. In this case, the first bore central axis and the first threaded central axis form a first plane and the second bore central axis and the second threaded central axis form a second plane, these first and second planes are identical or orthogonal to each other, the central axis lies on both planes.

The insertion of two through holes and two threaded holes in one

Weight module has the advantage that when using two identical weight modules, wherein the second weight module relative to the first weight module is rotated by 180 ° about the central axis, the two through holes of one weight module are congruent with the two threaded holes of the other weight module. By connecting the two weight modules with two screws, these are connected to each other in a torque-proof manner.

The weight module for a stand base according to the invention for a surgical microscope can have a bottom that is complementary in shape to its top side. At the

Assembly of two such trained weight modules, the top of the first weight module form-fitting with the bottom of the second weight module

be brought together. This results in a very simple connection between two weight modules without gaps. Are the surfaces in one of the Planar surface deviating surface shape formed, it may be sufficient, the two

To connect weight modules with only one screw against rotation.

According to the invention, a system with two identically formed weight modules, namely a first weight module and a second weight module, is provided for a stand base according to the invention, in which the second weight module is arranged rotated 180 ° relative to the first weight module around the central axis, so that the first weight module Bore central axis of the first through hole of the second weight module and the first threaded central axis of the first threaded hole of the first weight module lie on a first straight line and the second bore center axis of the second through hole of the second weight module and the second threaded central axis of the second threaded hole of the first weight module lie on a second straight line.

With this connection technology as many weight modules can be connected to each other, when each weight module is rotated relative to the adjacent weight module rotated by 180 °. At the same time there are cost advantages through the

Use of simple and identical weight modules.

With the stand base according to the invention for a surgical microscope, it is possible to cover a large variable weight range while reliably maintaining the safety requirements for the underrun protection.

Additional body can be used. The distance between the underside of the stand base and the floor may be greater than 12 cm. Thus, with a high degree of user-friendliness, the

Safety requirements for underride protection complied with. Pinching a footrest is not possible. At the next higher level of the attached surgical microscope, the weight of the stand base can be adjusted by means of equipping one or more weights. Due to the complete integration of the weight modules in a cavity of the stand base body, the distance of the stand base body to the ground, is reliably preserved in this case. In a further necessary increase in the weight of the tripod soot, an additional body can be attached to the bottom of the stand base body. By attaching the additional body to the underside of the stand base body results in a new distance between the bottom of the additional body to the ground. The distance can be less than 3.5 cm in this case and would thus reliably and user-friendly fulfill another safety requirement for the underrun protection.

The fact that the additional body in turn contains a cavity for at least one weight module, advantageously results in a further scope for adjusting the weight of the stand base. Advantageously, the cavity in the stand base body and the additional body are each designed so that identical weight modules can be introduced and secured in both bodies. After attachment of the additional body thus results in new cavity through the combination of the two cavities of the stand base body and the additional body. A weight module can thus be advantageously introduced from below through the additional body in the Stativfuß- basic body. By the possibility of using identical

Weight modules both for the stand base body and the additional body provide cost advantages in the production of the weight modules.

Due to the large number of different ways to introduce weight modules in the Stativfuß- basic body to attach an additional body to the underside of the stand base body, in turn, the weight modules can be introduced, resulting in a very large variable weight range. The simplest possible variable upgrade of the tripod base can be achieved if evenly graded weight values are selected. If the weight of the additional body is chosen so that it has twice, or three times or a different multiple of a weight module, the weight upgrade can also be done with an attached to the tripod base body additional body in a uniform Stufüng. This results in handling and time advantages for the user. There are no complicated billing procedures necessary. The desired weight upgrade can be determined very quickly.

A weight upgrade of Stativf ßes should be flexible. It makes sense to define the weight of the weight module in the smallest possible unit. This gives the advantage to produce lighter weight modules. If more than just a weight can be built into the body, it is already possible to flexibly differentiate even without an additional body

Achieve weight upgrades of the stand base body.

Further advantages and features of the invention will be explained with the aid of the drawings, in which:

Figure 1 shows a first embodiment of the inventive stand base in a sectional view in side view;

Figure 2 shows a second embodiment of the inventive stand base with an attached

Zuatzkörper in a sectional view in a side view;

FIG. 3 shows an embodiment of a weight module; and

Figure 4 shows a possibility of connecting two weight modules in a sectional view in a side view.

FIG. 1 shows a first embodiment of an inventive stand base 1 in one embodiment

Sectional view in side view. The core of the stand base 1 forms a stand base body 2. The stand base body 2 may be configured in any shape. For example, a design, as viewed from above, cylindrical, cuboid, star-shaped or "H" -shaped conceivable .. At the top of the stand base body 2 is a tripod stand 4 is attached to which a holding device not shown here for a

Surgical microscope is attached. The underside 6 of the stand base body 2 is in

Substantially parallel to a floor 3. The floor 3 represents a substantially plane

Surface on which the stand base 1 can be placed or on which the stand base 1 can be moved. The underside 6 has a Aufhahmevorrichtung 11. The

Aufhahmevorrichtung 11 allows the attachment of an additional body, not shown here. The Aufhahmevorrichtung 11 may have additional, not shown here, holes, threads or indentations, for example, a Nutfräsung. The stand base 1 can be equipped on its underside 6 with three to five, preferably four support elements. The support elements are used to set up the stand base on the floor 3. The support elements are designed as rollers 5 in the illustrated embodiment. The rollers 5 allow movement of the stand base on the floor 3. The rollers 5 may be equipped with a clamping or locking device, not shown, to prevent inadvertent displacement of the stand base 1 reliably.

The stand base body 2 has a cavity 7, which is open at the bottom 6 of the stand base. The cavity 7 is viewed from the bottom 6 forth, cuboid, but may also be square, round or configured in any other form. The shape of the

Cavity 7 is essentially defined by a base 8 and a height 9. A distance 10 of the bottom 6 of the stand base to the bottom 3 is 12 cm in this embodiment, in order to meet the currently applicable requirements of the standard "DIN EN 60601-1 3ed" to avoid foot injuries, referred to as underride protection.

In the cavity 7 of the stand base body 2, a weight can be introduced and secured. The weight may comprise a single weight module 101 or two

Weight modules 101, 102 composed. The weight modules 101, 102 are preferably identical. The weight modules 101, 102 are each designed so that they are slightly smaller than the cavity 7 and thus can be easily inserted and fixed in this.

FIG. 3 shows an embodiment of a weight module 101. The weight module 101 is cuboid. It thus has a rectangular bottom 31 and a height 32. The base of the bottom 31 of the weight module is smaller than the base 8 of the cavity 7, so that the weight module 101 can be easily introduced into the cavity 7. The amount of the height 9 of the cavity 7 is shown in Figure 1 twice as large as the amount of height 32 of the weight module 101st

When introducing the two weight modules 101, 102 together into the cavity 7, the lower weight module 102 can be flush with the underside 6 of the stand base body 2 to lock. The lower weight module 102 can also be fastened deeper into the cavity 7, so that a greater distance results between the base 8 of the lower side 31 of the lower weight module 102 and the base 3 than the distance 10 between the lower side 6 of the stand base. Base body 2 and the bottom 3. It is also possible that the lower weight module 102 is not completely inserted into the cavity 7 and thus protrudes. In this case, the distance between the bottom of the lower weight module 102 and the bottom 3 is less than the distance 10. However, it must be ensured that the distance between the underside of the lower weight module 102 and the bottom 3 fulfills the conditions for underride protection and thus has an amount of at least 12 cm.

When equipping the stand base body 2 of Figure 1 with weights, there are thus three variants. No weight module 101 can be introduced into the cavity 7, a single weight module 101 can be introduced into the cavity 7, or two weight modules 101 and 102 can be fastened together in the cavity 7. Is this

Single weight of a weight module, for example, 10 kg, can be in this example, the weight of the stand base body 2 increase by 10 kg or 20 kg. In any case, it is ensured that the distance 10 between the bottom 6 of the stand base body 2 and the bottom 3 is not changed. The attachment of the weight modules 101 and 102 in the cavity 7 can by screws,

Riveting, gluing or any other method of attachment done. The weight modules 101 and 102 may be permanently attached or attached by a releasable connection in the cavity 7. It is also conceivable, a damping device, for. Example, a film, thin foam, thin felt or other suitable material between the weight modules 101 and 102 or between the weight module 101 and the stand base body 2 to install to achieve a vibration and noise damping of the weight modules 101 and 102. It must be ensured that by installing the weight modules 101 and 102 including the intermediate damping materials, the distance between the bottom of the lower weight module 102 and the bottom 3 is greater than 12 cm, so as to meet the conditions for underride protection. Preferably, the amount of the total height, composed of the both amounts of the height 32 of the weight modules 101 and 102 and the material thickness of the additional damping material, overall less than the height 9 of the cavity 7, so that the bottom of the lower weight module 2 is flush with the bottom 6 of the Stand base 2 or completely the cavity 7 is introduced.

It is also possible that at least three weight modules are introduced into the cavity 7 of the stand base body 2, so that the total height of all weight modules together is less than or equal to the height 9 of the cavity 7. FIG. 2 shows a second embodiment of the inventive stand base 1 with an attached additional body 20 in a sectional view in a side view.

This figure shows the inventive stand base 1 of Figure 1. Attached to the receiving device 11 on the bottom 6 of the stand base body 2 of the additional body 20. The attachment of the additional body 20 to the receiving device 11 of the stand base body 2 can be done by screws, gluing, riveting or otherwise a known method of attachment. The additional body 20 may be permanently attached or attached by a detachable connection to the Stand base 2. However, the additional body 20 is preferably fastened by screws to the underside of the stand base body 2.

By attaching the additional body 20, the distance 25 between the bottom 24 of the additional body 20 and the bottom 3 is changed so that the requirements of the standard "DIN EN 60601-1 3ed" to avoid foot injury (underride protection) is met

Embodiment, the distance 25 is smaller than 3.5 cm.

The additional body 20 is advantageously designed so that it is adapted in the design (surface structure) and in the geometric shape (design) to the stand base body 2. If the stand base body 2, for example, designed such that it has an H-shape in plan view, the additional body 20 can also show an H-shape in plan view. It is also conceivable that the stand base body 2 is designed to have a star shape, an X shape, an O shape, a U shape or a Z shape. In this case, the additional body 20, adapted to the stand base body 2, also in star shape, X- Be designed form, O-shape, U-shape or Z-shape. The number of stand-up arms can be straight, for example four stand-up arms in the H-shape or X-shape. The number of stand-up arms can also be odd, for example, three or five stand-up arms in the star shape. The additional body 20 may have a closed and smooth outer surface. The additional body 20 can have the same color and / or surface structure as the stand base body 2.

The additional body 20 has a cavity 21. This cavity 21 may be formed such that it has a base 22 and forms an upwardly and downwardly open cavity 21. In this cavity 21, a single weight module 201 can be easily inserted and fixed. The weight module 201 is preferably constructed identically to the weight module 101 and the weight module 102.

It is also possible that the cavity 21 is formed such that two or three

Weight elements, which have the same size and shape of a weight module 201, can be jointly and completely introduced into the cavity 21.

The attachment of the weight module 201 in the cavity 21 can be done by screws, rivets, gluing or otherwise known fastening method. The weight module 201 may be permanently attached or attached by a releasable connection in the cavity 21.

The base 22 of the cavity 21 of the additional body 20 has the same shape and size as the base 8 of the cavity 7 of the stand base body 2. After attachment of the additional body 20 to the receiving device 11 thus results in a common cavity by the combination of the cavity 7 of Stand base body 2 and the cavity 21 of the additional body 20th

When equipping the stand base body 2 of Figure 2 with weights thus resulting in four variants. First, no weight module 101 can be inserted into the cavity 7 at all. Second, a single weight module 101 can be inserted into the cavity 7. Third, two weight modules 101 and 102 may be mounted together in the cavity 7. Fourth, there are a total of three weight modules 101, 102 and 201 in the common cavity, which is composed of the cavity 7 and the cavity 21, are introduced.

If the individual weight of a weight module 101, 102, 201 is, for example, 10 kg, the weight of the stand base body 2, to which the additional body 20 is attached, can be increased by 10 kg, 20 kg or 30 kg in this embodiment according to FIG.

This results in a total of a further scope for adjusting the weight of the stand base 1. For this example, it is assumed that the individual weight of the additional body 20 is 30 kg. To charge the stand base body 2 without additional body 20 with 10 kg or 20 kg, it is sufficient to introduce a weight module 101 or two weight modules 101, 102 in the cavity 7 and secure. In a desired weight charging of the stand base body 2 by 30 kg, however, only the additional body 20 to the

Stand base body 2 attached. In order to achieve a further increase in the weight of the stand base body 2 by 40 kg, 50 kg or 60 kg, the additional body 20 is fixed to the stand base body 2 and additionally a weight modules 101 or two

Weight modules 101, 102 or three weight modules 101, 102, 201 in the cavity, comprising the two cavities 7, 21, introduced and fixed. These weights are

Of course, a wide variety of weight values for the additional body 20 and the weight modules 101, 102, 201 are conceivable.

FIG. 3 shows an embodiment of the weight module 101. All weight modules 101, 102, 201 are preferably the same size. The weight module 101 is shown as a cuboid and has an upper side 38, the lower side 31 and the height 32. In the bottom 31, a first thread 35 and a second thread 33 is introduced. The weight module 101 further comprises a first through hole 34, a second through hole 36 and an opening 37. The threads 33, 35 may be designed as a blind hole thread or be introduced continuously, so that the length of the threads 33, 35 of the height 32nd equivalent. The thread 33 and the thread 35 preferably have the same thread diameter. The through-hole 34 and the through-hole 36 are made larger in diameter than the thread diameters of the threads 33, 35. The through-hole 34 and the through-hole 36 are preferably the same in diameter. Both through holes 34 and 35 have on top 38 here not shown countersink or hole to accommodate a screw head completely.

A central thread axis 48 of the first thread 35 has a distance 45 to a central axis 40. A bore central axis 47 of the first through hole 34 has a distance 44 to the central axis 40. The distance 44 and the distance 45 are equal in magnitude. A threaded central axis 50 of the second thread 33 has a distance 43 to the central axis 40. A bore central axis 49 of the second through-hole 36 has a distance 46 from the central axis 40. The distance 43 and the distance 46 are equal in magnitude.

In this embodiment, the weight module 101 has an opening 37. This opening 37 makes it possible to guide a component, for example a screw, or an assembly tool, for example an Allen key, through the weight module 101. The opening 37 is preferably located in the middle of the weight module 101, so that when mounting a plurality of weight modules 101, 102, 201 these openings 37 are superimposed, so that a component or a tool easily through all weight modules 101, 102, 201 passed therethrough can. FIG. 4 shows a connection possibility of the two weight modules 101 and 102 in a sectional view in a side view.

The weight module 101 is screwed by a screw 64, which is introduced into the first through hole 34, with a thread 61 in the stand base body 2. In addition, the weight module 101 is screwed by a screw 66, which is introduced into the second through hole 36, with a thread 62 in the stand base body 2.

The weight module 102 is rotated by 180 ° with respect to the weight module 101

Symmetry axis 40 installed turned. This is the first through hole 54 of the

Weight module 102 to the first thread 35 of the weight module 101 opposite. The central thread axis 48 of the first weight module 101 is aligned with the

Diameter central axis 57 of the second weight module 102. In addition, the second is located Through hole 56 of the weight module 102 to the second thread 33 of the weight module 101 and the central thread axis 50 of the first weight module 101 is aligned with the diameter central axis 59 of the second weight module 102. The screw 63 which is inserted into the second through hole 56 and screwed into the second thread 33 thus connects the weight module 101 to the weight module

102. Likewise, the screw 65, which is inserted into the first through-hole 54 and screwed into the first thread 35, connects the weight module 101 to the weight module 102. In this way, three or more weight modules 101, 102, 201 can be connected to one another.

stand base

Stand foot main body

ground

tripod stand

roll

Bottom of the stand base body 2

Cavity in the stand base body 2

Base of the cavity in the stand base body second

Height of the cavity 7 in the stand base body second

Distance of the underside 6 of the stand base to the bottom 3

Aufhahmeeinrichtung

additional body

Cavity in the additional body 20

Base surface of the cavity 21 in the additional body 20th

Height of the cavity 21 in the additional body 20th

Bottom of the additional body 20

Distance between the underside 24 of the additional body 20 to the bottom 3

Base area of the first weight module 101

Height of the first weight module 101

Second thread in the first weight module 101

First through hole in the first weight module 101

First thread in the first weight module 101

Second through hole in the first weight module 101 Opening in the first weight module 101

Top of the first weight module 101

central axis

Distance between symmetry axis 40 and second thread 33 44 distance between the axis of symmetry 40 and the first through hole 34th

45 distance between the axis of symmetry 40 and first thread 35th

46 distance between the axis of symmetry 40 and the second through hole 36th

47 bore central axis of the first through hole 34th

48 threaded central axis of the first thread 35th

49 bore center axis of the second through hole 36th

50 threaded central axis of the second thread 33rd

53 Second thread in the second weight module 102

54 First through hole in the second weight module 102

55 First thread in the second weight module 102

56 second through hole in the second weight module 102

57 bore center axis of the first through hole 54th

48 threaded central axis of the first thread 55th

49 bore center axis of the second through hole 56th

50 threaded central axis of the second thread 53rd

61 First thread in the basic stand body 2

62 Second thread in the base stand body 2

63 First screw

64 Second screw

65 Third screw

66 Fourth screw 101 First weight module

102 second weight module

201 Third weight module

Claims

claims:

Tripod foot (1) for a surgical microscope for placement on a flat surface (3)

with a stand base body (2) which can be fitted with at least one first weight module (101) and has a stand base body bottom (6),

- With a stand with the base body (2) connected to supporting means (5), which is brought to set up the stand base with at least three points with the bottom (3) for abutment, wherein the stand base base underside (6) of the is at least three points fixed level,

characterized in that

- The stand base-Grundköper-bottom (6) has a receiving means (11) for releasable connection to an additional body (20), wherein the smallest distance (10) between the stand base-Grundköper-bottom (6) and the plane is greater than 10th cm.

Tripod foot according to claim 1, characterized in that the receiving means (11) is designed as a plane surface.

Stand base according to claim 1 or 2, characterized in that the receiving means (11) has at least one threaded bore (61, 62).

Stand according to one of claims 1 to 3, characterized in that in the

Stativfuß base body bottom (6) has a cavity (7) for releasably introducing at least a first weight module (101) is introduced.

Stand according to claim 4, characterized in that the cavity (7) is cuboidal or cylindrical or circular cylindrical.

Stand base according to claim 1 to 5, characterized in that on the Stativfuß- base body bottom (6) of the additional body (20) is detachably connected to the receiving means (11). I. stand base according to claim 6, characterized in that the additional body (20) has an additional body underside (24) which faces the plane defined by the at least three points and the largest distance (25) between the

Additional lower body side (24) and the level is less than 4 cm, preferably less than 3.5 cm.

\. Stand according to one of claims 5 to 7, characterized in that in the

Additional body (20) has a cavity (21) for releasably introducing a weight module (201) is introduced.

9. stand base according to claim 8, characterized in that the cavity (7) of the Standfuß- base body (2) and the cavity (21) of the additional body (20), viewed from the underside, have the same cross-section. 10. stand base according to one of claims 5 to 9, characterized in that the

Additional body (21) is positively adapted and / or in the geometric shape of the stand base body (2).

I i. Tripod foot according to one of the preceding claims, characterized in that the smallest distance (10) between the stand base body bottom (6) and the plane is greater than 12 cm.

12. stand base according to one of the preceding claims, characterized in that the largest distance (10) between the stand base body bottom (6) and the plane is smaller than 20 cm.

13. weight module (101, 102, 201) for a stand base (1) according to one of claims 1 to 12 having a top (38) and a bottom (31), with a first through hole (34) between the top (38) and the underside (31), wherein in the bottom (31) parallel to the first through hole (34) has a first threaded bore (35) is introduced, wherein on the connecting line between the first bore center axis (47) of the first through hole (34) and the first Threaded central axis (48) of the first

Threaded hole (35) has a central axis (40) parallel to the first bore center axis (47), so that the distance (44) between the first bore center axis (47) and the central axis (40) has the same value as the distance (45) between the central axis (40) and the first threaded central axis (48), wherein the first

Threaded hole (35) is formed such that the outer diameter of the first threaded bore (35) is smaller than the diameter of the first through hole (34).

14. weight module (101, 102, 201) according to claim 13 with a second through hole (36) between the top (38) and the bottom (31), which is parallel to the first

Through hole (34) is introduced and with a second threaded bore (33) parallel to the second through hole (36) is introduced, wherein the second

Tapped hole (33) is formed such that the outer diameter of the second threaded bore (33) is smaller than the diameter of the second through hole (36), wherein the distance (46) of the second bore center axis (49) of the second

Through hole (36) to the central axis (40) has the same value as the distance (43) of the second threaded central axis (50) of the second threaded bore (33) to the central axis (40), wherein the first bore center axis (47) and the first

Thread central axis (48) form a first plane and the second bore center axis (49) and the second threaded central axis (50) form a second plane, said first and second plane are identical or orthogonal to each other, wherein the central axis (40) on both planes lies.

15. weight module (101, 102, 201) according to claim 13 to 14 in which the upper side (38) and the lower side (31) are complementary in shape to each other.

16, system comprising two weight modules (101,102) according to one of claims 13 to 15, characterized in that a second weight module (102) relative to the first weight module (101) is arranged rotated by 180 ° about the central axis (40), so that the first bore central axis (57) of the second weight module (102) and the first

Thread central axis (48) of the first weight module (101) lie on a first straight line and the second bore central axis (59) of the second weight module (102) and the second threaded central axis (50) of the first weight module (101) lie on a second straight line.